JPS5989866A - Labyrinth seal - Google Patents
Labyrinth sealInfo
- Publication number
- JPS5989866A JPS5989866A JP58193577A JP19357783A JPS5989866A JP S5989866 A JPS5989866 A JP S5989866A JP 58193577 A JP58193577 A JP 58193577A JP 19357783 A JP19357783 A JP 19357783A JP S5989866 A JPS5989866 A JP S5989866A
- Authority
- JP
- Japan
- Prior art keywords
- circumferential
- labyrinth seal
- seal
- cavity
- rotating shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000000368 destabilizing effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
- F16J15/4472—Labyrinth packings with axial path
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
の円周方向空所において均一な圧力分布を維・侍するこ
とにより、不安定化効果を著しく減少せしめ、これによ
り高Ｆｔ能ターボ機械の正常運転を約束するようにした
ラビリンスシールに関するものである。DETAILED DESCRIPTION OF THE INVENTION By maintaining a uniform pressure distribution in the circumferential cavity, the destabilizing effect is significantly reduced, thereby ensuring normal operation of the high Ft capacity turbomachinery. This is related to the labyrinth seal.
回転軸のためのラビリンスシールに、回転軸に面して一
連の円周方向歯部を包含し、これら歯部と回転軸との間
に円周方向空所を画成し、この中で流体を捕えてシール
の上流側から下流側へと流れる流体の流れを最小限とす
るものである。A labyrinth seal for a rotating shaft includes a series of circumferential teeth facing the rotating shaft defining a circumferential cavity between the teeth and the rotating shaft in which the fluid flows. This minimizes the flow of fluid from the upstream side of the seal to the downstream side of the seal.
しかしながら軸の回転にまたこのラビリンスシールの各
円周方向゛見所内にある流体にも回転を生じさせ、こと
にもしこの回転軸が何等かの理由で心ぶれして回転、部
分とシールとの間に偏心が生ずると、これら全所内の流
体の円周方向運動は各空所１ノコの圧力が円周方向に非
均等に分布することになり、回転軸の心ぶれ全一層大き
くし振動を次第ｐｃ ｒ；ｊ：げしくする傾向がある。However, the rotation of the shaft also causes rotation of the fluid within each circumferential point of this labyrinth seal, and especially if this rotation shaft rotates out of alignment for some reason, the parts and the seal If eccentricity occurs between them, the circumferential movement of the fluid in all these places will cause the pressure in each cavity to be unevenly distributed in the circumferential direction, which will further increase the runout of the rotating shaft and cause vibrations. Gradually pc r;j: There is a tendency to become violent.
これを自励不安定化効果と呼んでいる。この効果に回転
軸の安定に対し著しい影響を与える。This is called the self-excited destabilizing effect. This effect has a significant influence on the stability of the rotating shaft.
本発明の目的は、上述の欠点をなくすこと、すなわち従
来型のラビリンスシールＫＡ型的に生ずる不安定化効果
が生起しないラビリンスシールを提供することにある。The object of the invention is to eliminate the above-mentioned drawbacks, namely to provide a labyrinth seal which does not suffer from the destabilizing effects that occur with the conventional labyrinth seal type KA.
これに、ラビリンスシールの各円周方向空所内に充分７
：１１：数の半径方向邪魔壁を配置Ｌ７てこの円周方向
空所全円周方向に分割して隔室を形成せしめることによ
り達成される。このように円周方向壁ｌ５ＦＴヲ分割す
ることにより、各隔室内における流体゛の円８力向速度
ハ平均すると非常に低いものとなり、実際上各円周方向
窒所内にはほとんど対仏的な円周方向速度の分布が存在
することとなり、従って圧力分布も均一なものとなる。In addition, a sufficient 7
This is accomplished by arranging several radial baffles L7 and dividing the circumferential space of the L7 lever in the entire circumferential direction to form compartments. By dividing the circumferential wall 15FT in this way, the average velocity of the fluid in each compartment becomes very low, and in fact there is almost no space in each circumferential space. There will be a circumferential velocity distribution and therefore a uniform pressure distribution.
各円周方向空所内の圧力分布が常に円周方向に対称的な
ものとなれば、シールに対する回転軸の姿停に関係なく
不安定化効果は生起することがない。しかしこのことを
更に確実化するために、本発明の別の特長によれば、ラ
ビリンスシールの各円周方向空所の各別の隔室に半径方
向のｆ〜タクト連結されており、このダクトＨ外部円周
方向マニホルドに連結されている。If the pressure distribution within each circumferential cavity is always circumferentially symmetrical, no destabilizing effects occur regardless of the orientation of the axis of rotation relative to the seal. However, in order to further ensure this, according to another feature of the invention, each circumferential cavity of the labyrinth seal is provided with a radial f-tact connection to each separate compartment, this duct being H connected to an external circumferential manifold.
このようにしてラビリンスシールの空所の隔室のすべて
を互いに連通せしめ、これら隔室内の圧力を平衡せしめ
ることにより、円周方向マニホルドに回転軸の心ぶれが
たとえ生じたとしても各円周方向空所内で非均−玉力分
布が生ずる傾向をなくシ、このようにして大振幅の振動
がラビリンスシールの存在のために回転軸に誘起せしめ
られることを未姿になくしているのである。In this way, all of the chambers in the cavity of the labyrinth seal are communicated with each other, and the pressure within these chambers is balanced, so that even if the rotational axis of the circumferential manifold is misaligned, each circumferential direction This eliminates the tendency for non-uniform ball force distribution within the cavity and thus eliminates large amplitude vibrations being induced in the rotating shaft due to the presence of the labyrinth seal.
以下本発明を添付Ｎ面に例示したその、好適な実ｂＮ例
について詳述する。Hereinafter, a preferred practical example of the present invention illustrated on the attached page N will be described in detail.
図面において、符号／に回転軸、符号、２はラビリンス
シールヲ示ス。このラビリンスシールλは回転１＃ｌ／
に面して一連の円周方向空所、、？ｉ（’ｊ、＝＝７・
・・ｎ）を包含する。In the drawings, the symbol / indicates the rotation axis, and the symbol 2 indicates the labyrinth seal. This labyrinth seal λ is rotated 1#l/
A series of circumferential voids, facing ? i('j,==7・
...n).
各円周方向空所３１ぽ半径方向の一邪魔壁左１（１＝／
・・・０）により多数の隔室グｊ、 （ｉ ＝ ／・・
・ｎ）に円周方向に分割されている。各円周方向空所の
隔室４７１は対応する半径方向タークト６１（１−７・
・・ｎ）Ｋ、よってひとつの外部円周方向マニホルド７
ｉ（ｉ＝／拳・・ｎ）に連通している（特に第３図参照
のこと）。Each circumferential space 31 radial baffle wall left 1 (1=/
...0), a large number of compartments j, (i = /...
- Divided into n) in the circumferential direction. Each circumferential cavity compartment 471 has a corresponding radial tact 61 (1-7.
...n) K, thus one external circumferential manifold 7
It communicates with i (i=/fist...n) (see especially Figure 3).
第１図に本発明による回転軸用ラビリンスシールの一部
破断側面図、第２図は第１図のΔ−八へＩＦ−Ｇう断面
図、＄３図は第１図のＢ−Ｂ、腺すこ溢う断面図である
。
／・・回転ＱＩＩ、 ｓ・・ラビリンスシール、３Ｉ
＋・円周方向空所、ダ・・隔室、Ｓ・・邪魔壁、６・・
半径方向タクト、７・・外部円周方向マニホルド。
【Fig. 1 is a partially cutaway side view of the labyrinth seal for a rotating shaft according to the present invention, Fig. 2 is a cross-sectional view taken along IF-G to Δ-8 in Fig. 1, and Fig. 3 is a sectional view taken along line BB in Fig. 1. This is a cross-sectional view of the gland. /...Rotation QII, s...Labyrinth seal, 3I
＋・Circumferential void space, DA・Compartment, S・Baffle wall, 6・・
Radial tact, 7... External circumferential manifold. [
Claims (1)
とにより円周方向空所を形成しシール上流側とシール下
流側との間の流体の流れを最小ｇ＄制限するように流体
を捕捉する回転軸用のラビリンスシールにおいて、前記
円周方向空所のそれぞれに充分な数の半径方向邪魔壁全
配置して前記円周方向運動を隔室に分割するようにした
こと’ｔ−％徴とするラビリンスシール。 （２） 特許請求の範囲第１項記載のラビリンスシー
ルにおいて、各円周方向空所の各個の隔室が半径方向ダ
クトにより外部円周方向マニホルドに接続されているこ
とを特徴とするラビリンスシール。[Claims] (11) By arranging a series of circumferential southern portions facing the axis of rotation, a circumferential cavity is formed to minimize fluid flow between the upstream side of the seal and the downstream side of the seal. In a labyrinth seal for a rotating shaft that traps fluid in a g-limited manner, a sufficient number of radial baffles are disposed in each of the circumferential cavities to divide the circumferential movement into compartments. (2) In the labyrinth seal according to claim 1, each compartment of each circumferential cavity is connected to the outer circumferential direction by a radial duct. Labyrinth seal characterized by being connected to the manifold.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT23811A/82 | 1982-10-19 | ||
| IT23811/82A IT1152732B (en) | 1982-10-19 | 1982-10-19 | PERFECTED LABYRINTH SEAL |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5989866A true JPS5989866A (en) | 1984-05-24 |
| JPH0319424B2 JPH0319424B2 (en) | 1991-03-15 |
Family
ID=11210151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58193577A Granted JPS5989866A (en) | 1982-10-19 | 1983-10-18 | Labyrinth seal |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5989866A (en) |
| CA (1) | CA1249616A (en) |
| CH (1) | CH655770A5 (en) |
| DE (1) | DE3337989C2 (en) |
| FR (1) | FR2534655A1 (en) |
| GB (1) | GB2128693B (en) |
| IT (1) | IT1152732B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003505634A (en) * | 1999-07-16 | 2003-02-12 | エムテーウー・アエロ・エンジンズ・ゲーエムベーハー | Seal ring for non-hermetic fluid seal |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5707064A (en) * | 1993-01-08 | 1998-01-13 | The Texas A&M University System | Modulated pressure damper seal |
| US5794942A (en) * | 1993-01-08 | 1998-08-18 | The Texas A&M University System | Modulated pressure damper seals |
| SE507745C2 (en) * | 1996-11-05 | 1998-07-06 | Alfa Laval Ab | sealing device |
| FR2893358A1 (en) * | 2005-11-15 | 2007-05-18 | Snecma Sa | THERMOMECHANICAL PIECE OF TURBOMACHINE FOR REVOLUTION AROUND A LONGITUDINAL AXIS, COMPRISING AN ANNULAR LECHETTE, AND METHOD FOR MANUFACTURING THE SAME |
| JP4696147B2 (en) * | 2008-06-30 | 2011-06-08 | 株式会社日立製作所 | Turbo machine |
| US9074486B2 (en) | 2011-01-31 | 2015-07-07 | General Electric Company | Method and apparatus for labyrinth seal packing ring |
| NO334129B1 (en) * | 2012-09-06 | 2013-12-16 | Dynavec As | Labyrinth seal device for hydraulic flow machine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE494348C (en) * | 1930-03-21 | Karl Fischer Dipl Ing | Labyrinth stuffing box | |
| GB274049A (en) * | 1927-06-09 | 1928-05-03 | Fischer Karl | Improvements relating to stuffing box packing |
| DE884593C (en) * | 1940-05-12 | 1953-09-14 | Harry Kuhrmeier Dipl Ing | Sealing ring for high pressures |
| US2886351A (en) * | 1956-01-03 | 1959-05-12 | Orenda Engines Ltd | Elements for labyrinth seals |
| GB840573A (en) * | 1958-01-20 | 1960-07-06 | Rolls Royce | Labyrinth seals |
-
1982
- 1982-10-19 IT IT23811/82A patent/IT1152732B/en active
-
1983
- 1983-10-11 GB GB08327207A patent/GB2128693B/en not_active Expired
- 1983-10-18 CA CA000439209A patent/CA1249616A/en not_active Expired
- 1983-10-18 JP JP58193577A patent/JPS5989866A/en active Granted
- 1983-10-18 FR FR8316578A patent/FR2534655A1/en active Pending
- 1983-10-19 CH CH5692/83A patent/CH655770A5/en not_active IP Right Cessation
- 1983-10-19 DE DE3337989A patent/DE3337989C2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003505634A (en) * | 1999-07-16 | 2003-02-12 | エムテーウー・アエロ・エンジンズ・ゲーエムベーハー | Seal ring for non-hermetic fluid seal |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3337989C2 (en) | 1985-12-05 |
| IT8223811A0 (en) | 1982-10-19 |
| GB2128693A (en) | 1984-05-02 |
| GB8327207D0 (en) | 1983-11-09 |
| CH655770A5 (en) | 1986-05-15 |
| JPH0319424B2 (en) | 1991-03-15 |
| GB2128693B (en) | 1986-04-30 |
| IT1152732B (en) | 1987-01-07 |
| CA1249616A (en) | 1989-01-31 |
| DE3337989A1 (en) | 1984-04-19 |
| FR2534655A1 (en) | 1984-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3990813A (en) | Apparatus for tying moving blades | |
| US6145636A (en) | Ventilated rotor | |
| JPS5989866A (en) | Labyrinth seal | |
| JPS6199719A (en) | Support assembly for shaft | |
| US724994A (en) | Rotary fluid-engine. | |
| US20070069477A1 (en) | Stepped labyrinth damper seal | |
| US2341122A (en) | Hydraulic brake apparatus | |
| US3926010A (en) | Rotary heat exchanger | |
| JPS58221026A (en) | Disk rotor for disk brake | |
| JPS59170406A (en) | Honeycomb-shaped labyrinth seal | |
| US3166161A (en) | Hydrodynamic torque transmitting apparatus | |
| JPS5917035A (en) | Disk rotor for disk brake | |
| JPH01313601A (en) | Inner-ring rotary piston machine | |
| JPS5744707A (en) | Arrangement for damping vibration of rotor in axial-flow rotary machine | |
| US3129037A (en) | Gas-lubricated journal bearing | |
| US890819A (en) | Elastic-fluid turbine. | |
| US1503812A (en) | Steam turbine | |
| JPH0122985Y2 (en) | ||
| JPS6244145B2 (en) | ||
| JPS5813781B2 (en) | Pressure equalization structure of shaft sealing device | |
| JPS5824629A (en) | Brake rotor of disc brake | |
| GB1485551A (en) | Individualized stator and rotor for hydromatic brakes and brakes incorporating them | |
| JPH0228275Y2 (en) | ||
| JPS6221142Y2 (en) | ||
| JPS614885A (en) | Compressor |